Di-Sodium hydrogen phosphate anhydrous

EP, USP + LEC + Microbiological requirements

CAS #:


Molecular Formula:



SodiumPhosphate,Dibasic, Dibasic Sodium Phosphate, Disodium Hydrogen Phosphate, Disodium Phosphate

Molecular Weight:

141.96 g/mol


Dibasic Sodium Phosphate, Dried, is used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy. Anhydrous disodium hydrogen phosphate is a white, hygroscopic, odorless powder. Hydrated forms available include the dihydrate: a white crystalline, odorless solid; the heptahydrate: white, odorless, efflorescent crystals or granular powder; and the dodecahydrate: white, efflorescent, odorless powder or crystals.

Characters Unit Specification
Identity A (EP,BP) Acc.to requirements
Identity B (EP,BP) Acc.to requirements
Identity C (EP,BP) Acc.to requirements
Identity D (EP,BP) Acc.to requirements
Identity A (USP) Acc.to requirements
Identity B (USP) Acc.to requirements
Appearance of solution (EP,BP) Correlates to test
Reducing substances (EP,BP) Correlates to test
Assay (EP,BP) % 98,0-101,0
Assay (USP) % 98,0-100,5
Loss on drying (EP,BP) % <=1,0
Loss on drying (USP/NF) % <=5,0
Insoluble matter in water (USP) % <=0,4
Heavy metals (as Pb) mg/kg <=10
Arsenic (USP) mg/kg <=16
Arsenic (EP,BP) mg/kg <=2
Iron (EP,BP) mg/kg <=20
Monosodium phosphate (EP,BP) % <=2,5
Sulphates (USP) mg/kg <=2000
Sulfates (EP,BP) mg/kg <=500
Chlorides (USP) mg/kg <=600
Chlorides (EP,BP) mg/kg <=200
Bacterial endotoxine lU/g <=5
TAMC 30oC (Total aerobic microbial count) cfu/g <=50
TYMC cfu/g <=10
Escherichia coli cfu/g
Staphylococcus aureus cfu/g
Pseudomonas aeruginosa cfu/g
Salmonella cfu/10g

Shelf Life/Retest Date: Disodium hydrogen Phosphate anhydrous Cas No - 7558-79-4can be kept for at least 3 years if stored in a cool and dry place.

Storage/Shipping Conditions:

  • Keep container tightly closed in a cool, well-ventilated place.
  • Storage temperature recommended: < 25°C

Pack Sizes: 5 Kg

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